I am not absolutely certain, but I believe that all Guernsey (English Channel Islands - not the glassworks in the USA) is marked with an impressed logo of "thee lions" (although in some cases they look more like rabbits, or anchors :!: ).

By the shape, colours, etc., I would say yes, there is a distinct similarity! Can you investigate the makers of these, Tony? The ebay seller appears to have an enormous shop, with lots of Czech glass! :shock: